Selective printing and punching mechanism



Jan. 1, 1952 R. B. JOHNSON SELECTIVE PRINTING AND PUNCHING MECHANISM l1Sheets-Sheet 1 Original Filed Nov. 6, 1946 INVENTOR ATTORNEY Jan. 1,1952 R. B. JOHNSON 2,580,788

SELECTIVE PRINTING AND PUNCHING MECHANISM Original Filed Nov. 6, 1946 11Sheets-Sheet 2 v INVENTOR Mfw Jan. 1, 1952 R. B. JOHNSON 2,530,788

SELECTIVE PRINTING AND PUNCHING MECHANISM Original Filed Nov. 6, 1946 l1Sheets-Sheet 3 BY mi ATTORNEY Jan. 1, 1952 R. B. JOHNSON SELECTIVEPRINTING AND PUNCHING' MECHANISM Original Filed Nov. 6, 1946 llSheets-Sheet 5 0 RIM Y 3 w N5. R E ,O

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R. B. JOHNSON 2,580,788

SELECTIVE PRINTING AND PUNCHING MECHANISM Jan. 1, 1952 Original FiledNov. 6, 1946 ll Sheets-Sheet 6 nflm...

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SELECTIVE PRINTING AND PUNCHING MECHANISM Original Filed Nov. 6, 1946 11Sheets-Sheet 8 ATTORN Jan. 1, 1952 R. B. JOHNSON 2,580,738

SELECTIVE PRINTING AND PUNCHING MECHANISM Original Filed Nov. 6, 1946 llSheets-Sheet 9 i INVENTOR Fey/202a K L/afisolz BY E 52? ATTORN 1952 R.B. JOHINSON 2,530,738

SELECTIVE PRINTING AND PUNCHING MECHANISM ATTORNEY Jan. 1, 1952 R. B.JOHNSON ,5 8 SELECTIVE PRINTING AND PUNCHING MECHANISM Original FiledNov. 6, 1946 11 Sheets-Sheet ll H W-OTOZK FXQ ICDfi'IF I x owooumc (umINVENTOR ATTORNEY Patented Jan. 1, 1952 s'nsenv-E i nnrrmo A'Ni')Pn'N'cHrn'h MECHANISM 1d'B-., I hnsoh-. Bananas. w r as i' iiqr toInternational Business Machines .Cbrporai .ticn, Neil York, N. Y., achrnorati'on "of New York Original. application l\love1mber ti Serialbio. 708;163. "Divid'e'cla'nd this application July 1,

1948; Serial No. 365327 waist. (01. it ll-195 Thisv application is adivision of apnlicantscm fidm eppncau n erial No. TZQ$ 3;.filed Nof velbr 5, 1946, now Patent. NO. 2,524,127, granted octeb'eraisso. y y H Thisinvention relates to. printing machlnesand more particularly to printingmachinesinwhich characters are formed by selectively. actuatingcharacter forming wires whose ends. directly form the characters. V ,v ap r The principal object of the invention istoprovide a novel selectingand operating mechanism for a so-call'ed wire printer composedofrelative- 1y few parts and which is, not ex ensive and can bemanufactured very easily. c

A further object of the invention resides in the provision of recordpunching devices and Se lecting mechanism therefor-to selectcombinations of punches representativ'eof a character, in, which thepunches are arranged sq that upon their operation they will adjust theprint select ing and actuating element in accordance with the characterpunched, whereby there will be a concurrent punching and printing of aselected character. V I H N g A further object of the inventionistoprovide a compact mechanism wherein the moving parts are operativewithin short limits of movement for printing any of a nuinber ofalphabetic, nunieric or special characters at high speed.

Other objects of the invention will he pointed out in the followingdescription and claim'sand illustrated in the accompanying drawings,which disclose, by way of example the principle of the invention and thebest mode, whichhas been contemplated, of applying that principle.

In the drawingsj b v p A V Fig. 1 is an assembly showing the relativelo? cation of the printing and punching devices and the selectingdevices therefor. r n P Fig; 2 is a detail section taken on lines 2 ofFig. 1 showing the magnetic operators for the punch selection.

Fig. 3 is an enlarged assembly looking in the same directtionas Fig. 1;showingprinting wires and their relation to the punches,

Fig. 4 is a plan sectiontalgenon lines 4-4 of Fig. 3, showing the punchoperated slides for controlling the printse lecton A 4 M Fig. 5 is atime chart of 'thedrive devices. Fig. 6 i sa' diagram illustrating theprinciples embodied in the mechanism for enacting the print selection. aI, a M W I a A Fig. '7 is an enlarged isometric view ofthre punches andthe slide operating mechanism controlled thereby, 7 a p I I Fig 8 is ach'art showing the various characters that may be selectively printed bythe apparatus of the inventio'n. r a V V Fig. 9 is a cardshowing themanner in which the several characters are punched and printed y h a ars Fig. 10 is a section taken on lines Ill-l 0 of Fig. 1 showing thepunch selecting and operating ech i m r.

Fig. 11 is an enlarged detail of one of the punch actuated slideoperators, r

Fig; 12 isa section takenon lines IZ-IZ of Fig. 1, showing the printoperating mechanism.

Eig."13"isf a detail of the print operating devices in an operatingposition.

Fig. 14 is a Section taken on lines [4-44 Of Fig. 15 1s agreatlyenlarged face view of the print wire selecting and actuatingplate. 7

Fig.16 is a. perspective showing the relation between the printingplate, the printing wires and thepunches '7 a a v Fig. 17 is an enlargedview of a corner of the printingplate and one of, the print wires. v

Fig. 1.8 is a wiring diagram of the. electric cirwaster controlling theoperation of the ap- Referring tongs. 1, 3 and 10 the apparatuscomprises a bas'ie All and anupper section II, which are sfpajced apartto enable the passage of a recordcard lgh'r other record receiving Inail th tw ih fiui porfi i n. the 99? c: tion ll is arowof tw'elve'.punches l3 cooperable withsuitable die openin 14; in the. base men inline therewith is a group or wires l5 arranged with the ends thereofdisposed in a rectangle five wires in width and seven wires in length.Between the wire ends and card I2 is an ink ribbon represented at IS.

The particular manner in which the card is supported and positionedbeneath the punches and Wires forms no part of the present invention, sothat such mechanism is not illustrated, and it will sufiice to statethat the card is inserted in the position shown in Fig. 3 to receivepunching and printing in a selected column thereof, and then manuallyshifted to present another parallel column for punching and printing insuch other column.

With the card positioned as stated, the punches I3 will be operated topunch single or multiple holes II (see Fig. 9) representative of thecharacter appearing across the top of the card and, as the punchesoperate, they will cause selective movement of wires I5 to print apattern of the character corresponding to the hole or combination ofholes punched. These wire patterns are separately shown in Fig. 8. It isto be noted that, with the wire ends in contacting engagement with oneanother, the patterns are printed as tangential dots in parts of theiroutline, and due to the tendency of the ink pressed from the ribbon tospread slightly these portions of the outline will have the appearanceof a continuous line.

Punching mechanism The devices for selecting and operating the puncheswill first be described, and thereafter it will be explained how thepunches effect selection of the printing wires to effect printing of thecharacter corresponding to the hole or holes punched.

Referring to Fig. 10, each of the punches I3 is integral with a stem I8guided for vertical reciprocation and notched to straddle an operatingbar I8. Pivoted to each stem I8 is a bell crank biased counterclockwiseby a spring 2|. The horizontal arm 22 of the bell crank normally liesunder an edge of an interposer 23 (see Fig. 1) which holds the bellcrank in the position shown in Fig. 10.

When any interposer 23 is drawn to the right as viewed in Fig. 1, itwill release its related arm 22 whereupon spring 2| will rock the bellcrank 20 into the position shown in Fig. 7, where the hooked end 24thereof lies beneath bar I8.

Each interposer 23 has integral therewith a rod 25 whose lower end isflattened and provided with an opening into which the free end of anarmature 26 extends (Fig. 2). The armature is integral with a leafspring 21 so that, when magnet 28 (of which there are twelve arranged ina compact formation) is energized, armature 26 is attracted and willdraw its related rod 25 and interposer 23 to the right as viewed in Fig.1 to release arm 22. Upon deenergization of the magnet, spring 27 willrock the armature 26 and connected parts back to their initialpositions. The upper extremities of interposers 23 abut against rollers29 provided to facilitate the sliding action by lessening frictionalresistance.

The punches I3 and their stems I8 are numbered 12, 11, 0, 1, 2, 3, 4, 5,6, 7, 8 and 9 to represent the vertical card positions (see Fig. 9) withwhich they cooperate, and the controlling magnets 28 are similarlynumbered in the circuit diagram (Fig. 18). The twelve magnets areconnected through a wire 38 to negative side of a suitable currentsource, and each is also connected 4 to a wire 3| numbered to correspondto related magnets.

A plurality of keys 32 is provided, one for each of the forty-sevenpossible characters, and each key upon operation will close one or aplurality of contacts 33 which will complete a circuit or circuits fromthe positive side of the current source and wire 34 to the magnet ormagnets 28 representing the character selected. For example, if the Akey 32 is depressed, it closes its two contacts 33 to complete parallelcircuits from wire 34 to the 12 and 1 wires 3| and the 12 and 1 magnets28 to wire 30. This results in shifting the related interposers 23 sothat the bell cranks 20 of the 12 and 1 punches I3 will be coupled tothe punch bar I9 for operation thereby. The other character and symbolcombinations can be similarly traced for each of the other keys.

Referring to Fig. 10, when bell crank 20 is in the position shown, itengages a contact blade 35 to hold it in the position shown and, whenthe bell crank is rocked counterclockwise, blade 35 will pivot under itsown resiliency to close a pair of contacts 36. There is a blade 35 foreach of the bell cranks, and these are represented in Fig. 18 connectedto a wire 31, extending to a clutch magnet 38. One side of each pair ofcontacts 3B is carried by a common bar 39 connected to wire 34 so that,when any one or any multiple of bell cranks 20 is or are rocked,contacts 36 complete a circuit to energize clutch magnet 38 which willcause the punch bar I 9 to be reciprocated as follows. Motor 40 runsconstantly and drives a clutch driving element 4| adjacent to which is adisk 42 carrying a spring pressed dog 43. Energization of magnet 38 willattract its armature latch 44 releasing dog 43 for engagement in thedriving notch of element 4 I, whereby disk 42 will be driven for onerevolution during which magnet 38 is deenergized to return armature 44to releasing position. The parts just described representdiagrammatically a well known so-called one revolution clutch. M I

Integral with disk 42 is a gear 45 driving a gear 46 on shaft 41 at a 5to 1 ratio so that for each revolution of disk 42 shaft 41 makes 9.fifth of a revolution. This shaft as shown in Fig. 10 has a pair offive-lobe complementary cams 48 secured thereto cooperating with arocker arm 50 pivoted at 5|. Arm 50 is articulated to a vertical rod 52(Figs. 1, 3 and 10) whose upper end is connected to punch bar I9. Thebar I8 has pins 53 at opposite ends extending to a pair of bell cranks54 pivoted to the framework at 55 and 4 connected together by a link 56.Thus, when rod 52 is reciprocated, the parallel motion device 54, 56will cause the bar I8 to move down and draw with it the punches whosehooks 24 have been rocked.

The operation of the keys 32 is momentary so that during the down strokeof bar IS the magnets 28 become deenergized and interposers 23 slideback into position. When the bar I9 returns upwardly, positivelyretracting the punches,

Operation of the selecting slides The upper end of each punch stem I8 isof areduced diameter, providing a shoulder 60 (Figs.

10, 11 and. 7) upon which a block 6| slidable on the.- stem normallyrests... A spring; 62; bears against a collar 63 securedto the upperend. of stem. [Si and against; the top of bIQCkl St to urge. iteagainst:shoulder; 60.. With suchconstruction, the block. 61.- reciprocatesvwith. the punch 13 with stemv I8 being drawn downwardly through spring.

62. and returned upwardly by shoulder 68.

Blockv 6|. has laterally extending flanges 64. between which astationary bar 65 exends on one side. and a stationary bar 5.6 extendson the opposite side. These; bars are supported through spacing rivets68' (Fig. 11.) by the main side plates 61 and. are dimensioned so as nottointerfere with the reciprocationof the blocks 5 i Eachv block. 61 hasaninterposer i8.- (Figs. 3 and. '7)v positioned. between flanges Ed onone, side. or the other and. disposed in. the space between bar 651 andplate. 6.7. or bar 6.6. and oppositev plate 61', so that as they blockis; reciprocated. its, related interposer also moves up and down in thespace between har and plate. The interposer [0 is freely disposed.between the flanges 6. 3, so, that it may slide laterally. Bar and itsrelated plate.- 6'l are each provided with a pair of oppositely facingchannels 1!: intowhichrollers 12 extend. Bar and its related plate 11.are similarly channeled to receive rollers 13. These rollers are free:to shift laterally in. the channels.

Referring to Figs. 1 and 3, rollers 12 farthest to theright; abutagainst a fixed Stop and the onefarthest to the left abuts a slide I5.In line with this; slide (Fig. 1.), is a short'slide l6 urged bl.

spring ll against alever- 18, between the two, slides, so. that thepressure exerted by spring. l1 urges all the rollers 73 and interposersat the forward side. of the blocks 6| toward the right as shown in Fig.3. 0n the opposite side of blocks 6| there is a similar arrangement (seeFig. 4) including a fixed stop 19;, slides 88, 8 I, lever 82 andactuating spring 83.

In Fig. 6 the two sets of opposite rollers 1,2, 13 and relatedinterposers are shown diagram-matically, one above the other, withnumbered dotted lines indicating the related punches. Thus, the 12,,11,. 0 and 4 punches, when operated, each move down a single interposerof the forward or lower set. The 1, 2, 3, 4 and 5 punches when operatedeach move down a single interposer of the rear or upper set. The 6, '7and 9 punches when operated each move down a pair of interposers, one ineach set.

The several interposers have variously configured vertical cammingedges, some of which when the interposer is moved down, will increasethe spacebetween adjacent rollers and shift slides 15 and 80 to theleft. Others will decrease this distance so. that slides 15 and 80, moveto the right under the influence of their springs. H and 83 re.-spectively. Slide may move one, two or three steps to the right and one,two, three or four steps to the left, as indicated by the scale, whileslide, 8.0- may move one or two steps to the right and one, twoor threesteps to the left. The several interposers are marked +1, +2, 3, +4 toindicate that, when. one. of these is depressed, it will shift. itsslide one, two, three or four steps to the left. Those marked -1, 2 and3 will permit their slides to shift one, two or three steps to theright. Thus, if the 12 punchv is operated, the left hand interposer inthe lower row is depressed to bring its portion of least width intoalignment with. the rollers 12., decreasing the spacing and allowingslide 15. to shift one step to the right.

In the following table are listed separately for each possible characterthe punching combination andjthe distance: morectqtosetherwith; thedimer-- tilmi taken, oi: th SIid'QSJ 5.. and 80.

In. the foregoing manner, the punching of each character hole. orcombination of holes will be accompanied by a difierential positioningof slides 15 and 8B in either a leftward or. rightward direction.

In Fig. 1, the slide 15 will position lever 18 to rock a rod 85, whichas best shown in Fig. 16

has a pair of arms 86 engaging in notches 81 of a plate 88, so that theplate 88 is positioned up or down accordingly as slide 15 is right orleft.

The slide (Fig. 4) will position lever 82 about its pivot 89 (see Fig.16) and rock an integral finger 90* engaging in a notch 9| of plate 88,so that the plate is positioned forward or rearward accordingly as slide88 is positioned left or right. Thus. for each of the fortysevenpossible characters, the plate 88 will be adjusted in forty-sevendifferent positions.

Printing wire selection In Fig. 3.. the. wires. I5, of which. there arethirty-five. as. stated. extend through tubes 92 anchored in a. member93 and a plate 914.. Fig. 16 shows, the direction in which the wires arespread to form. a, rectangle. at their left ends across the face ofplate 88. The portion of the wires to the right of member 53 extendthrough openings in the base. H which serves to hold the lower ends incompact juxtaposition. At the upper end, each wire (see Fig. 17.) hascrimped thereon a collar 95 engaged by a spring 96 which serves to holdthe. wire retracted as shown, with fixed plate ill serving as a limitstop. 7 I

Integral with plate. 88,. is a metalli sheet as etched with a pattern ofhigh and low portions. The surface of this plate appears as shown in 7.Fig. 15 at a greatly enlarged scale, and in'this figure the wires I5 areindicated by sectional circles in the relative relationship before theplate 88 is positioned by the punching devices. As explained, the platemay be positioned up or down and to the right or left with respect tothe wires, and these movements are so proportioned that each wire willcooperate with any one of forty-seven squares surrounding the square itinitially confronts.

After the plate is positioned, it is pressed toward the wires and,whenever a high portion of sheet 98 is in line with a wire, such wirewill be actuated to print a mark on the record. Fig. 17 shows thearrangement for the wire I5 in the upper left hand corner, from which itis seen that this wire is used in printing of the characters H, F, R, P,Z, X, W, 2, D, A, B, E, M, L, K, and N. It will be noted also in Fig. 16that this wire I5 prints the lower left hand corner of these characters,and it will be noted in Fig. 8 that each of the characters listed abovehas a dot in the extreme lower left hand corner.

To take a specific example, such as the letter A, when the 12 and lpunches operate, plate 88 is shifted one step up and one step to theleft which will bring all the raised portions marked A into line withthe wires forming the pattern for this letter. In Fig. 15 these are thesix uppermost wires in .the left hand column and in the right handcolumn the three central wires in the bottom row. All other wires willbe opposite low portions, so that their wires are not effectivelyactuated.

From Fig. 6 it can readily be determined for each character, in whichdirection and to what extent plate 88 is shifted. Thus, for example, theletter B punched as a 12 and 2 hole shifts plate 08 one step up and twosteps to the left. Looking at Fig. 15, one step up and two steps to theleft bring all squares marked B into alignment with the wires to formthe pattern of this character.

Wire actuating mechanism Referring to Figs. 3, l3 and 14, the plate 86has adjacent thereto a plate I provided with cam surfaces WI. The plateI00 is notched to straddle fixed blocks ,I02 so that it may move towardand away from plate 88 but is constrained against vertical movement.Spring pressed plungers I03 (Fig. 3) normally bear against plate 88 tohold it in. the position of Fig. 3 away from the wire ends, and as theplate 88 is differentially positioned by the punches it will slideacross the face of plate I00.

To the left of plate I00 is a stationary member I04 with cam surfacesI05. Between cam surfaces IOI and I05 is a frame I06 notched to receivea pair of rods I0I carrying rollers I08.

This frame rides in notches in blocks I02, so that it can movevertically but not horizontally (as viewed in Fig. 13) Upon elevatingthe frame, rollers I08 will ride along cams I05 and shift rightward intheir notches, at the same time forcing cams IOI to the right along withplates I00 and 88 to effect printing action. Upon retraction of theframe, plungers I03 return the parts to normal position.

Frame I06 has integral therewith a rod I09 extending through a fixedguide IID. Pinned to the rod is a cup III within which there is a springII2. Surrounding cup III is a sleeve I I3 loose on the rod andcontaining a spring I I4.

Referring to Figs. 3 and 1, cup I II is grooved to receive a pin inlever II5 which is connected by rod H6 to a lever II'I pivoted at II8(Fig. 12). The free end of this lever has a surface I20 in line withpins I 2| carried by disks I22 on shaft 41. In the position of Fig. 12 apin I2I is holding lever Ill and through the connections traced cup IIIis held in the position of Fig. 12 against the action of spring II4.

Sleeve H3 is similarly grooved to receive a pin in lever I23 (Figs. 1and 12) which is connected by a rod I24 to a lever I25 pivoted at H8.The free end of this lever is in line with pins I26 carried by disksI22. In the position of Fig. 12 a pin I26 has rocked lever I25 a slightamount to hold sleeve H3 in the position shown, where it compressessprin II4 a small amount.

The position of the parts in Fig. 12 is that during the rest position ofthe apparatus and as explained, when a key selection is made, shaft 41is turned through a fifth of a revolution. Fig. 5 shows the relativemovements during this fifth revolution of the punch bar I9, the frameI06 and the sleeve I I3. Thus, as the bar I6 moves to force the punch orpunches through the card from 0 to 25, pin I26 (Fig. 12) rocks lever I25counterclockwise to elevate sleeve H3 and compress spring II4 stillfurther. Up until about 20, cup I I I remains locked so that at suchpoint it is under considerable pressure. At 20 roller l2I rides oifsurface I20 freeing cup III, so that spring II4 now released will urgecup III and frame I06 rapidly upward to effect printing in the intervalbetween 20 and 25. This position of the parts is shown in Fig. 13 wherea bumper disk I28 limits the extent of upward movement of stem I09.

At 25 both levers III and I25 are free of their acting pins I2I and I26,respectively, so that spring H2 in cup I II will move both cup III andsleeve II3 through spring I I4 downwardly and near the end of the fifthof a revolution the next pin I2I will engage and lock lever Ill and cupIII, while the next pin I26 moves bar I25 and sleeve I I3 to effect theslight initial compression of spring II4.

When it is desired to punch without the accompanying printing, a hookI30 (Fig. 1) may be rocked counterclockwise manually or through actionof magnet I3I to engage pins in the ends of levers II5 and I23 to lockthem in the position shown in Fig. 1. In such position it will be notedthat lever I I1 is held out of cooperative relationship with pins I2Iand lever I25 is also held out of effective range of pins I26 so that,when shaft 41 turns, the levers will remain substantially as in Fig. 1.'Although the print plate 88 takes a character selecting position, itwill not be shifted against the wires.

While there have been shown and described and pointed out thefundamental novel features of the invention as applied to a singlemodification, it will be understood that various omissions andsubstitutions and changes in the form and details of the deviceillustrated and in its opera tion may be made by those skilled in theart without departing from the spirit of the invention. It is theintention therefore to be limited only as indicated by the scope of thefollowing claims.

What is claimed is: Y

1. In a machine of the class described, a re of punches, one for eachindex point position of a column of a record card, a group of printingwires, means for selectively actuating the punches, devices controlledby the punches and effective upon the actuation of a punch for selectingthe printing wires of said group whose arrangement corresponds to thepunch actuated, and means for actuating the selected printing wires.

2. In a machine of the class described, a row of punches, one for eachindex point position of a column of the record card, a group of printingwires, means for selectively actuating the punches, singly or incombinations, devices controlled by the punches and eifective upon theactuation of a punch or combination of punches for selecting theprinting wires of said group, whose arrangement corresponds to thecharacter represented by the punch, or combination of punches actuated,and means for actuating the selected printing wires.

3. In a printing and punchingmachine, a row of punches, one for eachindex point position of a column of a record card, selecting andactuating means therefor, a group of printing wires adapted to print inline with said row of punches, a pair of slides differentiallypositionable by said punches to represent the character punched,mechanism controlled by said slides for selecting printing wirescorresponding to the pattern of the character punched, and means foractuating the selected wires during the actuation of the Punches.

4. In a printing and punching machine, a row of punches, one for eachindex point position of a column of a record card, selecting andactuating means therefor, a group of printing wires adapted to print inline with said row of punches, a pair of slides, each diiferentiallypositionable in two directions by said punches to represent thecharacter punched, mechanism controlled by said slides for selectingprinting wires corresponding to the pattern of the character punched,and means for actuating the selected wires during the actuation of thepunches.

5. In combination, a row of disks lying in a common plane and guided formovement along a straight line, means for urging the disks toward oneanother, cam elements extending between certain pairs of adjacent disks,a punch connected to each element, means for selectively operating thepunches. movement of any punch causing its related element to movetherewith to increase or decrease the distance between adjoining disks,the disk at one end of the line being held against movement whereby thedisk at the other end of the line will be positioned differentially, inaccordance with the amount of net increase or decrease of the distancebetween disks, and a recording device controlled by the said other enddisk to select a character for recording in accordance with thedirection and extent of movement of said disk.

6. In combination, a row of disks lying in a common plane and guided formovement along a fixed line, means for urging the disks toward oneanother, cam elements extending between certain pairs of adjacent disks,a punch connected to each element, means for selectively operating thepunches, movement of any punch causing its r related element to movetherewith to increase the distance between adjoining disks, the disk atone end of the line being held against movement whereby the disk at theother end or the line will be positioned difierentially in accordancewith the amount of increase of the distance between disks and arecording device controlled by said other end disk to select a characterfor recording in accordance with the extent of movement of said disk.

7. In combination, a row of disks lying in a common plane and guided formovement along a fixed line, means for urging the disks toward oneanother, cam elements extending between certain pairs of adjacent disks,a punch connected to each element, means for selectively operating thepunches, movement of any punch causing its related element to movetherewith to decrease the distance between adjoining disks, the disk atone end of the line being held against movement whereby the disk at theother end of the line will be positioned difierentially in accordancewith the amount of decrease of the distance between disks and arecording device controlled by said other end disk to select a characterfor recording in accordance with the extent to movement of said disk.

REYNOLD B. JOHNSON.

REFERENCES CITED The following references are of record in the file 01'this patent:

UNITED STATES PATENTS

